... , Outer Tape, Joint Tape, Tape Primer, and Putty Tape with 10-odd categories in nearly 100 specifications. They can be used ... pipelines in facility projects of petroleum, petrochemical industry, city gas, oil and gas storage and transportation, power, water supply, metallurgy, civil ... and then wraps the outer tape. Tape tensibility can be 10 to 20 N / cm. The overlapped length between beginning and ...